net: sockets: Add dummy impl for SO_REUSEADDR and TCP_NODELAY sockopts
net: sockets: Add dummy impl for SO_REUSEADDR and TCP_NODELAY sockopts

These options are oftentimes used when implementing servers, and
thus required to port existing socket apps. These options are also
safe to just ignore, e.g. SO_REUSEADDR has effect only for repeated
recreation of server socket (not an expected usecase for a Zephyr
app), while TCP_NODELAY is effectively the default for Zephyr, as we
don't implement TCP buffering (aka Nagle algorithm).

Signed-off-by: Paul Sokolovsky <35cb557f011771c94f127d6fef99f804b62203f5@linaro.org>

GiulianoFranchetto/zephyr,finikorg/zephyr,galak/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,ldts/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,Vudentz/zephyr,finikorg/zephyr,ldts/zephyr,Vudentz/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,finikorg/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,Vudentz/zephyr,nashif/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,nashif/zephyr,ldts/zephyr